Improvement in sewing-machines



c. H. WILLCOX. Sewing Machine. No. 42.036. Patented March 22, 1864.

a. Penn; Halo-LBW. wanu. a

UNITED STATES PATENT OFFICE.

CHARLES H. wiLLooX, or NEW YORK, N. YY., Assienoa To JAMES- WILLGOX, OFSAME PLACE.

IMPROVEMENT IN SEWING-,MACHINES.

Specification forming part of Letters Patent No. 42,036, dated March722, 1864.

' To all whom it may concern.-

.York, have invented certain new and useful Improvements in Sewing-Machines; and I hereby declare the following to bea tull, clear, andexact description of the same, reference being had to the accompanyingdrawings, in which-- Figures 1 and 2 represent a plan and frontelevation of a part of a sewing-machine to which my improvement isapplied, and Figs. 3 and 4 arodetail views.

In sewing-machines in which the cloth or material to be sewed is movedalong'the sewing-table or cloth-plate by means of av reciprocating feedmechanism known as the Wilson feed, and in other sewing-machines inwhich the feed is efi'ected by a mechanism vibratory in its character,the noise attendant on the operation ofsuch inachinesis frequently asource of great annoyance, particularly, however, in familysewing-machines intended to be run in homes, where the clatter of themachine atwork often disturbs the sleep of children or the repose of thesick.

This invention has for its object obviating the noise attendant upon theworking of sewing-machines; and it consists in the application ofleather or other suitable soft material between the feed-bar andadjustable stop and the feed-actuating cam or eccentric, so as toprevent such metallic surfaces from coming 'in contact when at work, andthereby obviating the noise attendant upon the working of sewing-minhines.

To enable others to make and use this invention, I shall now proceed todescribe the mannerin which the same is or may be carried into effect.

Referring to the accompanying drawings, L represents part of a frame ofa sewing-mm,

' chine, throughwhich passes the shaft P, on'

the end of which is turned the eccentric-pin O, fitting into the slot inthe teed-bar M. In this slot is fitted a buffer or pad, R, of leather orother suitable material, to receive the forward thrust of theeccentric-pin 0.

Sis a circular washer, of leather or other suitable material, attachedattached to the handle N by means of the screw Q, which passeseccentrically through ahole inboth into the frame, and binds the washerbetween i the handle N and the face of the frame L, pro- ,7

duciug sufficient friction to prevent it being turned by the action ofthe feed-bar M, which in the course of the revolution of theeccentricpin 0 is forced back by a spring against the adjustable stopjust referred to. v

The buffer or pad I make by first cutting long strips of leather of theform shown in isometrical perspective view in Fig. 3, and by thencutting the same into sections in width equal to the thickness ofthatpart of the feedbar in which it is to be inserted, or of a lesser width,sufficient, however, to produce the desired effect. One of thesestrip-sections is then introduced into the cavity or recess upon theleft-hand side of the eccentric 0 by bending the edges m and n andforcing it home, as indicated in Fig. 4. The peculiar shape ofthestrip-sections and the mode of introducing them will produce therequisite curvature and surface of contact with the eccentric.

The operation of the feeding mechanism is the same as in thoseheretofore constructed that is to say, the l'eed'bar M has a vibratoryup-anil-dowu and back-and-torth motion upon the spindle or pin vT. Theiced-bar, on advancing, in order to elevate the feeding-sun f-ice abovethe cloth-table, strikes against the washer b, the object of which is tolimit the stroke and consequently to regulatethe length of stitches. Thefeed-bar is caused to recede and to depress the feeding-surface belowthe cloth-plate by the eccentric 0 working against the pad R. The feedbar is therefore vibrated between two points which are padded withleather, as herein shown and described.

Having now fully described the nature of my invention, 1 claim- 5 1. Theapplication and use of leather or other sound-deadening 'material'interposed betweenv those parts of the feed mechanism of sewing-machineswhich strike against or come in contact with each other wheirat workwith a view to the prevention of noise, as hereinbefore described.

2. The method herein described of forming the pad or buffer B by cuttingstrips of the form described and introducing the same into'

